On 02/25/2010 05:06 AM, Lu Wang wrote:
...
The
problem is the na.exclude function does not work here. Is it the reason
that my missing values are not 'NA's but blank? How can I get the pie
chart without those missing values?
Hi Lu,
Your problem is most easily solved when reading in the data.
# this reads the blank fields as <NA>
level<-read.table("lu_wang.dat",header=TRUE,fill=TRUE,na.strings="")
pie(table(level$level))
Jim
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